Investigation of thermo-mechanical properties of surface treated SiO2/epoxy nanocomposite. (2021)

• Record Type: Journal Article
• Authors: Kumar Singh, Sushil; Kumar, Amit; Singh, Samarjit; Kumar, Abhishek; Jain, Anuj
• Is Part Of: Materials today. Volume 38:Part 5(2021)
• Page Start: 2861
• Page End: 2865
• Publication Date: 2021
• Subjects: Surface modification -- SiO2 nanoparticles -- Fracture properties -- Viscoelastic properties -- Epoxy nanocomposites; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.09.137
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: The present work investigates the effect of surface-treated SiO2 nanoparticles on the thermo-mechanical property of epoxy-composites. The surface interactions between the SiO2 nanoparticles and epoxy matrix were improved by surface treatment of SiO2 nanoparticle with different functionalization agents. Four functionalization agents namely 3-glycidyloxypropyltrimethoxy silane (GPTMS), 3-aminopropyltriethoxy silane (APTES), 3-(2-aminoethyl amino)-propyl trimethoxy silane (AEAPTMS), and 3-(trimethoxysilyl) propyl methacrylate (TMPM) were employed for the surface-treatment of SiO2 nanoparticles. No significant change in particle size of SiO2 was observed after surface-treatment, however significant improvement in mechanical properties was observed. It was observed that the percentage elongation and fracture toughness improved significantly with surface modification of the nanoparticles. Fracture toughness (K1C ) and fracture energy (G1C ) were calculated to be 5.62 MPa.m 1/2 and 65.81 KJ/m 2, respectively, for pristine silica-epoxy nanocomposite, whereas these values increase to 9.3 MPa.m 1/2 and 124.27 kJ/m 2 with the dispersion of GPTE treated 1 wt% SiO2 nanoparticles. The value of storage modulus was increased by 159.64% for GPMT modified SiO2 nanoparticles. Thus, surface-treated SiO2 -epoxy nanocomposites exhibited improved thermo-mechanical properties.